export function debounce(func, wait) {
  let timeout;
  return function (...args) {
    clearTimeout(timeout);
    timeout = setTimeout(() => func.apply(this, args), wait);
  };
}

export function getNormalizedPointer(event, windowWidth, windowHeight) {
  return {
    x: (event.clientX / windowWidth) * 2 - 1,
    y: -(event.clientY / windowHeight) * 2 + 1,
  };
}

export function computeNoiseOffset(index) {
  const glslRandom = (x, y) => {
    const dot = x * 12.9898 + y * 78.233;
    const sin = Math.sin(dot);
    const val = sin * 43758.5453123;
    return val - Math.floor(val);
  };
  const instanceNoise = glslRandom(index, 123.456);
  return (instanceNoise - 0.5) * 0.3;
}